Improvement in drying apparatus



z Sheets-Shed 2. F. W. YOUNG.

DRYING APPAR si No.1.85,418. tented. Dec. 19,1876.

WITNESSES .INVEN S Z UNITED STATES PATENT QFFICE.

FOUNTAIN W. Y OUNG, OF LAKE, ILLINOIS.

IMPROVEMENT lN DRYING APPARATUS.

Specification forming part of Letters Patent No. 185,418, dated December19, 1876; application filed J annary 3, 1876.

To all whom it may concern:

Be it known that I, FOUNTAIN W. YOUNG, of Lake, in the county of Cookand State of Illinois, have invented a new and ImprovedFertilizer-Drying Apparatus; and I do hereby declare the following to bea full, clear, and exact description thereof, which will enable othersskilled in the art to which it appertains to make and use the same,reference being bad to the accompanying drawings, forming part of thisspecification, in which- Figurel is a longitudinal sectional elevationof a drying apparatus embodying my said invention. Fig. 2 is atransverse section taken on the line w 00, drawn across Fig. 1; and Fig.

3 is an end view with theboiler end removed.

Similar letters of reference indicate like parts in the several figuresof the drawings.

My invention relates to that class of driers employed in drying therefuse matter from slaughter-houses for fertilizing purposes; and itsobject is to provide a drying-cylinder and steam-generator combined, theparts so arranged as to allow the escaping products of combustion topass through the drying-cylinder when desired, and to utilize the heatradiating from the generated steam employed in operating the device foragitating the material within the drying-cylinder. To that end itconsists in the arrangement of parts, as will be more fully understoodby the following description and claims.

In the drawings, A A represent the walls of the furnace; B, the firebridge; (J, the boiler-front, and D the grates, all of which areconstructed and arranged in any suitable manner. E is the outer or mainshell of the boiler, which is secured within the furnace in the usualmanner. E is the inner shell, forming the drying-cylinder F. The lengthand diameter of this shell is less than the length and diameter of shellE, and it is centrally located within the latter, forming a water-space,G, around its entire surface, between it and the outer shell, as shownin Figs. 1 and 2. H is a system of horizontal fines located within thewater-space Gr, and extending through the ends a a of the outer shell. Jis an open-ended tube communicating with the interior of thedrying-cylinder through the outer shell E, as shown in Fig. 1, formingthe admission-opening through which the material to dried is introducedinto the dryingcylinder. J is an 0pen-ended pipe communicating with theinterior of the drying-cylinder through shell E, and extending upwardthrough the roof of the building within which the apparatusislocated,forming the escape-pipe, through which the smoke passes when theproducts of combustion are admitted into the drying-cylinder. K is anopen-ended tube communicating with the interior of the drying-cylinder,near its end, through the outer shellE, and extending downward to andcommunicating with a horizontal pipe, K, extending through the walls A Aof the furnace, forming the exit-opening through which the driedmaterial is discharged from the cylinder. L is the steam-dome, securedto the outer shell E in the usual manner. M is the smoke-box,communicating with the chimney M in the usual manner. I is an open-endedtube or short cylinder, permanently located between the ends a and d ofthe outer shell and drying-cylinder, as shown in Fig. 1. One end of thistube communicates with the interior of the drying-cylinder, and theother end communicates with the smokebox, forming an unobstructedpassage, D, from the smoke-box into the cylinder. 1 is a sliding plate,secured to the outer side of the end a of the shell, within thesmoke-box, by means of guides or ways, and so arranged as to close thepassage D when desired. N is a horizontal shaft, located centrallywithin the dryingcylinder F, and extending through the rear wall of thefurnace, as shown in Fig. 1. This shaft is journaled within boxes 0 c,secured to, and between the ends a and d of the outer shell anddrying-cylinder, and within the box 0, secured to frame 0, located nearthe rear wall of the furnace, and is so arranged as to freely revolve.Mounted upon this shaft, within the drying-cylinder, is a series ofarms, f, carrying horizontal bars j, for agitating the material withinthe cylinder by the rotation of the shaft. N is a horizontal shaft,journaled in boxes h h, secured to the frame 0. P is a gear-pinion,mounted on shaft N, and adapted to engage a corresponding gear, P, onshaft N, by which means a rotary motion is imparted to said shaft by therotation of shaft N. Mounted upon shaft N is a fixed pulley, R, aroundwhich is passed a suitable belt, communicating with the band-wheel ofthe engine, (not shown,) by which a rotary motion is communicated tosaid shaft N. S is a loose pulley mounted on shaft N, to which the beltis transferred when not necessary to rotate said shaft. T is thesteam-pipe communicating with the dome, and extending to the steam'chestof the engine in the usual manner. 0 is a sliding plate arranged toclose the opening in tube K, the'object of which is to prevent thematerial within the drying-cylinder from passing out before beingproperly dried. G is the damper for closing the upper end of thesmoke-box when desired.

The operation of my invention will be as follows: The water-space G isfilled with water, and the fire Within the furnace ignited, when theproducts of combustion pass back under the outer shell of the boiler,and return through the fines H into the smoke-box, generating steamwithin the Water-space.

When sufficient steam to operate the machinery is generated the materialto be dried is introduced into the drying cylinder F through tube J, andthe latter tightly closed by the cover g. The steam is then admittedinto the steam-chest of the engine, imparting motion to the moving partsof the same,

which is transmitted to shaft N through the medium of the belt,imparting a rotary motion to said shaft, which is communicated to shaftN through the medium of pinion P and gear P, imparting a rotary motionto said shaft, causing the bars f to move through the material withinthe drying-cylinder, properly agitating the same.

During the first part of the process of drying the material plate I isremoved, so as to open passage D, and damper G in the smokebox istightly closed, when the products of combustion pass from the smoke-box,through passage D, into the drying-cylinder, and out through pipe J,thus bringing the products of combustion in direct contact with thematerial to be dried, utilizing the hea'twhich would otherwise be lostif allowed to pass into the chimney.

When the material is sufliciently dried, so that it would be liable toignite by being in direct contact with the products of combustion,damper G is opened and passage D closed by the plate, when the escapingproducts of combustion pass from the smoke-box up the chimney, and thedrying of the material is completed by the heat radiating from the waterand steam within space G around the drying-cylinder. The drying of thematerial beingcompleted, plate 0 is drawn out, opening the escape-tubeK, and the dry material is discharged from the drying-cylinder throughtube K and pipe K. It will be seen that with this arrangement of partsthe process of drying the material is greatly facilitated by utilizingthe escaping products of combustion, together with the heat radiatingfrom the steam and heated water within the space around thedryingcylinder.

Having thus described my invention, I claim- 1. In a fertilizer-dryingapparatus, the combination with theonter and inner shells E and E,forming the annular steam and water space G, and the drying-chamber F,and provided with series of flues H, as described, of the shaft N,carrying the series of bars f, for adjusting the material within thedrying-chamber, substantially as specified.

2. The combination, with .the drying-cylinder F, as described, of theescape-pipe J, damper G, passage D, and plate I, arranged to open andclose said passage, substantially as and for the purpose specified.

FOUNTAIN W. YOUNG. Witnesses:

JULIUS WELOKE, J. B. THOMAS.

